5G NR ICIC Coordination Using 3D Time-Frequency-Beam Matrices
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Solution Overview
Problem
There is a lack of standardized inter-cell interference coordination (ICIC) mechanisms in 5G New Radio (NR) networks, which are not capable of handling the dynamic and varied interference conditions arising from different numerologies, beamforming, and flexible downlink/uplink transitions, and existing LTE ICIC mechanisms are not adaptable to NR's flexible frame structure and spatial domain capabilities.
Innovation Solution
Adaptation of existing LTE ICIC procedures to the Xn-C interface, incorporating beam-centric design and aligned resource block boundaries, and utilizing the CU-DU architecture for explicit handshakes and CU proxy functions to enable unified ICIC mechanisms across Xn and F1 interfaces, with 3-D matrices for time/frequency/space domain coordination, including BHII, BRNTP, BOI, BABS, and eBCoMP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LTE ICIC mechanisms are used in 5G NR networks, then interference coordination can be provided, but the mechanisms cannot handle dynamic interference conditions from different numerologies, beamforming, and flexible downlink/uplink transitions
Solution Approach 1:
The patent implements dynamic ICIC mechanisms that adapt to varying interference conditions in real-time. The system dynamically adjusts resource allocation, beamforming parameters, and numerology configurations based on current network conditions, allowing the ICIC mechanism to remain effective across different deployment scenarios and interference patterns that static LTE mechanisms cannot handle.
Solution Approach 2:
The patent changes key parameters including numerology (subcarrier spacing, cyclic prefix length), beamforming configurations, and resource block allocations to adapt ICIC to 5G NR requirements. By modifying these parameters, the system achieves versatility across different frequency ranges and service types while maintaining reliable interference coordination through standardized procedures.
2Adaptability or versatility
If a unified ICIC framework is implemented across Xn and F1 interfaces, then interoperability is improved, but the device complexity increases
Solution Approach 1:
The patent creates a universal ICIC framework that operates across both Xn and F1 interfaces using common procedures and message structures. This multi-functional approach allows the same ICIC mechanisms to serve multiple interface types and deployment scenarios, achieving interoperability without requiring separate specialized mechanisms for each interface, thereby limiting the increase in complexity.
Solution Approach 2:
The patent introduces intermediary elements such as standardized information elements and coordination messages that facilitate communication between different interfaces. These intermediaries translate and harmonize interface-specific protocols, enabling unified ICIC operation across Xn and F1 without requiring complex direct integration between all components, thus managing the overall system complexity.
3Measurement precision
If finer granularities in interference management are enabled, then interference coordination precision is improved, but the signaling overhead increases
Solution Approach 1:
The patent segments interference management into hierarchical levels, applying fine granularity only where needed. Resource blocks are grouped into resource block groups, and interference coordination is performed at multiple granularities simultaneously - fine granularity for critical resources and coarser granularity for less sensitive areas, reducing overall signaling overhead while maintaining precision where required.
Solution Approach 2:
The patent applies different levels of interference management granularity to different spatial and frequency locations based on local interference conditions. Beam-specific and resource-specific ICIC are applied locally where interference problems exist, rather than uniformly across the entire network, achieving high precision interference coordination in problematic areas while minimizing signaling overhead in areas with fewer interference issues.
Data Source
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AI summary
Systems, methods, apparatuses, and computer program products for unified inter-cell interference coordination (ICIC) for 5G NR are provided. One method may include muting radio resources or transmitting with reduced power on radio resources where the radio resources are treated as facets of a hypercube represented as elements of a N-dimensional matrix. The method may also include transmitting at least one inter-cell interference coordination message comprising the N-dimensional matrix, wherein the N-dimensional matrix comprises at least two of a dimension signifying frequency, a dimension signifying time, or a dimension signifying beam information.